Mahabharata 6.26.24

ब्रह्मार्पणं ब्रह्महविर्ब्रह्माग्नौ ब्रह्मणा हुतम्ब्रह्मैव तेन गन्तव्यं ब्रह्मकर्मसमाधिना

brahmārpaṇaṃ brahmahavirbrahmāgnau brahmaṇā hutambrahmaiva tena gantavyaṃ brahmakarmasamādhinā

Our plain-language meaning of this verse is waiting for scholar review.